|Literal English||Sacred Fire|
Seika are the flames conjured by Shiki after applying the Yin and Yang principles to either the Fire Release: Dragon Fire Technique or Fire Release: Great Fireball Technique to bring about a drastic change. Instead of being average color, Seika is instead a majestic white, which has also earned the flames a nickname: Hikaruhonō (光る炎, Shining Flames).
However the flames require large quantities of Chakra to utilize. So much in fact that whenever Shiki uses it for more than a few minutes at any given time he is drained completely, requiring extended bed rest. Even small usages drain him physically. In addition there is quite the degree of strain placed on the muscles as well as the spirit, as both physical and spiritual energy is required to use them. So while powerful it is not without its downsides.